The BRADEN brake valve is a reliable hydraulic valve with internal components manufactured to close tolerances.
Due to the close tolerances and mating of components, the valve housing, spool, piston and check poppet are not
available as replacement parts.
Before disassembling the brake valve, be sure you have conducted all applicable troubleshooting operations and
are certain the brake valve is causing the malfunction.
Thoroughly clean the outside surfaces of the valve and work in a clean dust free area, as cleanliness is of utmost
importance when servicing hydraulic components.
BRAKE VALVE SERVICE
DISASSEMBLY
1. Remove the pilot orifice from the brake release (BR)
port using a 5/32 in. Allen wrench.
2. Remove the spool spring retainer (3) and spool
spring (11). Check spring free length. Replace spring
if less than 1 15/16 in. (49.2 mm) long.
3. Remove spool plug (4) and carefully remove spool
assembly (5 & 6).
4. Remove the damper piston (6) from the spool (5).
The piston will come out slowly, because of a partial
vacuum formed as it is removed. Use extreme care
to avoid damaging the polished surfaces of the pis-
ton or spool.
Item
Description
Quantity
1
Valve Housing (NSS)
1
2
Relief Valve Retianer (NSS)
1
3
Spring Retainer (NSS)
1
4
Plug (NSS)
1
5
Spool (NSS)
1
6
Damper Piston (NSS)
1
7
O-ring
1
8
Relief Valve
1
9
Pilot Orifice
1
10
Relief Valve Spring
1
11
Spool Spring
1
12
O-Ring
2
13
O-Ring
1
14
O-Ring
1
15
Back-up Ring
1
16
Back-up Ring
1
19
Plug -4 ORB
1
22
Shim
A.R.
Brake Valve Assembly
29
